From 3799caa4fcca37721d3dbb50fcecb15435a132ef Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Sat, 23 Sep 2017 21:07:39 +0200
Subject: [PATCH] Improve UsageError when used with --pdb

It might not be clear that pytest-xdist is used at all, and this should
help users to make --pdb work.
---
 xdist/plugin.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xdist/plugin.py b/xdist/plugin.py
index b47cbe8..b7bb485 100644
--- a/xdist/plugin.py
+++ b/xdist/plugin.py
@@ -105,7 +105,7 @@ def pytest_cmdline_main(config):
         if val("dist") != "no":
             if usepdb:
                 raise pytest.UsageError(
-                    "--pdb incompatible with distributing tests.")
+                    "--pdb is incompatible with distributing tests; try using -n0.")  # noqa: E501
 
 # -------------------------------------------------------------------------
 # fixtures